Quantum Dot (QD) Polymer Composites for On-Chip Light Emitting Diode (LED) Applications
Quantum dot polymer composites for on-chip light emitting diode applications are described. In an example, a composite for on-chip light emitting diode application includes a polymer matrix, a plurality of quantum dots dispersed in the polymer matrix, and a base dispersed in the polymer matrix.
1 . A composite for on-chip light emitting diode application, the composite comprising:
a polymer matrix;
a plurality of quantum dots dispersed in the polymer matrix; and
a base chemical compound dispersed in the polymer matrix.
2 . The composite of claim 1 , wherein the polymer matrix comprises a silicone material.
3 . The composite of claim 1 , wherein the base chemical compound is selected from the group of base chemical compounds consisting of lithium hydroxide (LiOH), potassium hydroxide (KOH), sodium hydroxide (NaOH), rubidium hydroxide (RbOH), cesium hydroxide (CsOH), magnesium hydroxide (Mg(OH) 2 ), calcium hydroxide (Ca(OH) 2 ), strontium hydroxide (Sr(OH) 2 ), barium hydroxide (Ba(OH) 2 ), tetramethylammonium hydroxide ((Me) 4 NOH), tetraethylammonium hydroxide ((Et) 4 NOH), tetrabutylammonium hydroxide ((Bu) 4 NOH)), lithium diisopropyl amide (LDA), sodium bis(trimethylsilyl)amide (sodium HMDS), potassium bis(trimethylsilyl)amide (potassium HMDS), and combinations thereof.
4 . The composite of claim 1 , wherein each of the plurality of quantum dots is immobilized and separated from one another within the polymer matrix.
5 . The composite of claim 1 , wherein each of the plurality of quantum dots is coated with an insulator coating.
6 . The composite of claim 1 , further comprising:
a plurality of light-scattering nanoparticles different from the plurality of quantum dots.
7 . The composite of claim 6 , wherein the plurality of light-scattering nanoparticles comprises a material selected from the group consisting of silica and magnesium oxide.
8 . The composite of claim 1 , further comprising:
fumed silica dispersed in the polymer matrix.
9 . The composite of claim 1 , further comprising:
dioctyl sodium sulfuccinate dispersed in the polymer matrix.
10 . A light emitting diode chip comprising a layer of the composite of claim 1 disposed thereon.